Final answer:
The statement about BNA Portfolios being grouped into collections based on a common topic is true (a). Similar to a writing portfolio, these collections are designed to offer comprehensive insights into specific subjects.
Step-by-step explanation:
The question refers to BNA Portfolios, which are topic-specific resources that provide comprehensive insights on subjects such as income tax accounting. When related portfolios are grouped under a common theme or topic, they form what is known as a collection. True, BNA Portfolios are indeed grouped by area of common topic into collections. For example, within the domain of income tax accounting, clicking on the relevant heading would reveal multiple portfolios that pertain to this theme.
These portfolios serve to display various aspects and nuances of the topic in question, providing a thorough understanding for those who access them. It’s similar to how a writing portfolio may contain different pieces of writing on a specific area of study or professional focus, showcasing the range and depth of one’s expertise or development in that field.